Electricity: motive power systems – Power factor control of armature or line circuit
Patent
1998-11-12
2000-10-10
Martin, David
Electricity: motive power systems
Power factor control of armature or line circuit
248479, 248549, 248900, 359872, 359876, 359877, G05F 170, H02P 528, H02P 736
Patent
active
061305146
DESCRIPTION:
BRIEF SUMMARY
CROSS REFERENCE TO RELATED APPLICATION
Not Applicable;
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
Not Applicable;
REFERENCE TO MICROFICHE APPENDIX
Not Applicable
BACKGROUND OF THE INVENTION
The invention relates to a wing mirror having an electrically operable pivoting mechanism, and to an electrically operable pivoting actuator.
A pivoting actuator comprises two actuator parts rotatably mounted relative to each other. Furthermore, an electrically operable pivoting actuator comprises an electromotor and a transmission system for rotating those actuator parts relative to each other. A pivoting actuator can be used for various applications where it is desired to rotate or pivot two structural members relative to each other. For that purpose, one actuator part will be attached to one of these structural members, and the other actuator part will be attached to the other one of these structural members; when the actuator parts are then rotated relative to each other, operated electrically or non-electrically, the structural members will rotate or pivot relative to each other about a rotation or pivot axis coinciding with the rotation axis of the actuator parts. Within the scope of the present invention, the terms "rotate" and "pivot" will be used interchangeably.
Such a pivoting actuator can be used particularly but not exclusively in a wing mirror of a vehicle such as for instance a motorcar. Hence, the invention will hereinafter be described for such a practical example.
It is generally known that cars are fitted with at least one wing mirror. The wing mirror comprises a bowl-shaped mirror housing having disposed therein a mirror plate, which, during use, is directed substantially at right angles to the longitudinal direction of the car to enable the driver to view the road section located alongside and behind the car. The mirror housing projects over a particular distance from the side of the car. In particular situations, it is desired that that distance will be reduced, for instance during parking in a narrow space. For that purpose, the mirror housing can be pivoted relative to the car about a pivot axis which, in most cases, is directed substantially vertically, and the end of the mirror housing can be moved closer to the body of the car through a rearwardly directed rotational movement about that axis; such a movement will hereinafter be referred to as folding in, and the position thus reached will be referred to as fold-in position. The reverse pivotal movement, from the fold-in position to the normal operational position (also referred to as fold-out position) will be referred to as folding out.
This pivoting possibility also concerns a safety aspect. If an obstacle outside the car touches the mirror housing, the mirror housing yields, so that damage is avoided or at least reduced, both to the car and the mirror and to the obstacle, which may also be a person. Hence, for reasons of safety, it is desired, and often even laid down by law, that the mirror housing is capable of making a comparable pivotal movement in forward direction. Hereinafter, such a movement will be referred to as folding over, and the position thus reached will be referred to as fold-over position. The reverse pivotal movement, from the fold-over position to the normal operational position, will be referred to as folding back.
To enable those pivotal movements, the mirror housing is pivotably mounted on a mirror foot or mirror base, intended to be fixedly mounted on the car. These pivotal movements can then be carried out under the influence of an external force, which will be referred to as manual operation. From a viewpoint of control convenience, the wing mirror further comprises a pivoting actuator or pivoting mechanism which can be electrically controlled by the driver of the car, i.e. for instance by pressing a button, for carrying out this fold-in movement and this fold-out movement. The pivoting mechanism comprises an electromotor and a transmission mechanism coupled to the mirror housing and
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Blom Adrianus Johannes
Brouwer Stefan Frits
Oesterholt Goran Bernd
Van Zanten Albertus
IKU Holding Montfoort B.V.
Johnston Roger A.
Martin David
Martin Edgardo San
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